their intro: Many websites have an accessibility feature called skip links that help some users navigate the site. However, there’s a problem with basically all skip links on mobile devices, which hurts your site’s accessibility instead of improving it.

tool to check for backlinks and keyword ranking. $7, 7-day trial available, after that it's expensive - min $99 p/month. I think this service was mentioned by the seo presentar at cdmon event in cibernarium.